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Paper Roll Weight Calculator — Reel Weight, Length & GSM Check

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Diameter / width unit Paper caliper unit Primary weight unit Roll outer diameter Core outside diameter Web width Paper caliper Paper grammage (GSM) Number of identical rolls Whole rolls only.Known core mass (kg) Optional. Enter actual core mass, not a guessed standard.Measured net paper weight Optional calibration; use the selected primary weight unit.

Calculated result

624.69 kg paper-only / roll

7,808.6 m theoretical web · 7,808.62 m² paper area

624.69 kg paper-only for 1 roll(s)

Enter a measured net roll weight to audit model variance

Show the working

1. Normalize: OD 1,000 mm, core OD 76 mm, width 1,000 mm, caliper 0.1 mm.
2. Length = π × (1,000² − 76²) ÷ (4 × 0.1) = 7,808,617 mm = 7,808.62 m.
3. Area = 7,808.62 m × 1 m = 7,808.617 m².
4. Paper-only weight = 7,808.617 × 80 ÷ 1000 = 624.689 kg.

Planning estimate. Use the actual core outside diameter and total wound caliper. GSM and caliper tolerances, moisture, coatings, winding compression and diameter measurement error change real weight. Core/packaging weight is excluded unless explicitly entered; use a scale for freight, lifting or machine-limit decisions.

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